CVE-2015-8340 Denial of service in n/a
Guest OS administrators can cause a host crash or deadlock in Xen via improper lock release in memory exchange operations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-8340?
CVE-2015-8340 is a medium-severity denial of service vulnerability in Xen Xen, published on 17 Dec 2015. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The memory_exchange function in common/memory.c in Xen 3.2.x through 4.6.x does not properly release locks, which might allow guest OS administrators to cause a denial of service (deadlock or host crash) via unspecified vectors, related to XENMEM_exchange error handling.
Weakness: CWE-17
Which versions are affected by CVE-2015-8340?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2015-8340?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2015-8340 being exploited?
There is no known exploitation of CVE-2015-8340 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2015-8340, GHSA-m46m-c4vg-mwcw, UBUNTU-CVE-2015-8340.